CN110456549B - Stereoscopic display device with adjustable optimal viewing distance - Google Patents
Stereoscopic display device with adjustable optimal viewing distance Download PDFInfo
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- CN110456549B CN110456549B CN201910914959.9A CN201910914959A CN110456549B CN 110456549 B CN110456549 B CN 110456549B CN 201910914959 A CN201910914959 A CN 201910914959A CN 110456549 B CN110456549 B CN 110456549B
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- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 claims abstract description 67
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 31
- 230000000737 periodic effect Effects 0.000 claims description 8
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
Abstract
The invention provides a stereoscopic display device with an adjustable optimal viewing distance. The stereoscopic display device with the adjustable optimal viewing distance consists of a light source array, a plurality of polymer dispersed liquid crystal plates and a liquid crystal display panel. The light source array and the polymer dispersed liquid crystal panel are used for forming a rear slit grating. The liquid crystal display panel is used for providing a parallax composite image. The post-slit grating may project pixels of different parallax images to different spatial positions in a horizontal direction, thereby forming a viewpoint. When the eyes are positioned at different viewpoint positions, parallax images corresponding to the eyes can be seen, so that stereoscopic vision is generated. The polymer dispersed liquid crystal panel is switchable between a scattering and a transparent state. Only a single one of the polymer dispersed liquid crystal panels is in a scattering state at the same time. Different optimal viewing distances can be obtained because of the different distances from the polymer dispersed liquid crystal panel to the liquid crystal display panel.
Description
Technical Field
The present invention relates to display technology, and more particularly, to stereoscopic display technology.
Background
The 3D display technology is a display technology that can realize real reproduction of stereoscopic scenes, which can respectively provide different parallax images for human eyes, thereby enabling a person to generate stereoscopic vision. The rear-mounted grating stereoscopic display is an important category of stereoscopic display technology, and the rear-mounted light source can respectively project pixels, which are respectively in front of the rear-mounted light source and belong to different parallax images, in different spatial directions, so that a viewpoint is formed. When the human eyes are respectively at different viewpoints, the left and right eyes can respectively see different parallax images, thereby generating stereoscopic vision. However, the optimal viewing distance of the traditional rear grating stereoscopic display device cannot be adjusted because the geometrical structure of the traditional rear grating stereoscopic display device is fixed. Therefore, the invention provides a stereoscopic display device with an adjustable optimal viewing distance, which can change the optimal viewing distance according to actual needs.
Disclosure of Invention
The invention provides a stereoscopic display device with an adjustable optimal viewing distance. Fig. 1 is a schematic structural diagram of the stereoscopic display device with adjustable optimal viewing distance. The stereoscopic display device with the adjustable optimal viewing distance consists of a light source array, a first polymer dispersed liquid crystal plate, a second polymer dispersed liquid crystal plate, a third polymer dispersed liquid crystal plate and a liquid crystal display panel. The light source array, the first polymer dispersed liquid crystal panel, the second polymer dispersed liquid crystal panel, the third polymer dispersed liquid crystal panel and the liquid crystal display panel are sequentially arranged in sequence.
The light source array, the first polymer dispersed liquid crystal panel, the second polymer dispersed liquid crystal panel and the third polymer dispersed liquid crystal panel are used for forming a rear slit grating. The periodic structure units in the light source array can emit light beams forward, and the emitted light beams do not horizontally diverge in the propagation direction. The first, second and third polymer dispersed liquid crystal panels are switchable between a scattering and a transparent state. Only a single one of the polymer dispersed liquid crystal panels is in a scattering state at the same time. The light beams projected by the light source array are projected to the position of the polymer dispersed liquid crystal panel in a scattering state, form vertical stripes which are horizontally arranged and scatter towards the direction of the liquid crystal display panel, so that a rear grating used for realizing a rear slit grating structure is formed.
The liquid crystal display panel is used for providing parallax composite images, and pixels belonging to different parallax images are sequentially arranged on the liquid crystal display panel according to columns.
The rear slit grating formed by the light source array, the first polymer dispersed liquid crystal plate, the second polymer dispersed liquid crystal plate and the third polymer dispersed liquid crystal plate can project pixels belonging to different parallax images to different space positions in the horizontal direction, so that a view point is formed. When the eyes are positioned at different viewpoint positions, parallax images corresponding to the eyes can be seen, so that stereoscopic vision is generated.
In the stereoscopic display device with the adjustable optimal viewing distance, the distance from the polymer dispersed liquid crystal panel in a scattering state to the liquid crystal display panel is as followsdThe pitch of the pixel columns belonging to the same parallax image on the liquid crystal display panel ispThe horizontal pitch of the periodic structure unit of the light source array islThe optimal viewing distance isD. The above parameters satisfyD=pd/(l-p)。
According to the above formula, the stereoscopic display device with adjustable optimal viewing distance can be selected according to the viewer position and the corresponding polymer dispersed liquid crystal panel is in a scattering state. Distance from the first, second and third polymer dispersed liquid crystal panels to the liquid crystal display paneldDifferent optimum viewing distances can be obtainedD。
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of a polymer dispersed liquid crystal panel according to the present invention.
Fig. 3 is a schematic diagram of a light source array structure unit.
Icon: 010-a stereoscopic display device with an adjustable optimal viewing distance; 100-arrays of light sources; 210-a first polymer dispersed liquid crystal panel; 220-a second polymer dispersed liquid crystal panel; 230-a third polymer dispersed liquid crystal panel; 300-a liquid crystal display panel; 020-polymer dispersed liquid crystal panel optical path; 030-light source array structural units; 110-a light source; 120-a first cylindrical lens; 130-second cylindrical lens.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Examples
Fig. 1 is a schematic structural diagram of a stereoscopic display device 010 with an adjustable optimal viewing distance according to the present embodiment. In the figure, the x-coordinate represents the horizontal direction in space, the y-coordinate represents the vertical direction in space, and z represents the direction perpendicular to the x-y plane. Referring to fig. 1, the present embodiment provides a stereoscopic display device 010 with an adjustable optimal viewing distance, which is composed of a light source array 100, a first polymer dispersed liquid crystal panel 210, a second polymer dispersed liquid crystal panel 220, a third polymer dispersed liquid crystal panel 230 and a liquid crystal display panel 300. The light source array 100, the first polymer dispersed liquid crystal panel 210, the second polymer dispersed liquid crystal panel 220, the third polymer dispersed liquid crystal panel 230, and the liquid crystal display panel 300 are sequentially arranged one after the other.
The stereoscopic display device 010 with an adjustable optimum viewing distance provided in this embodiment will be further described below.
Referring to fig. 1, the light source array 100, the first polymer dispersed liquid crystal panel 210, the second polymer dispersed liquid crystal panel 220, and the third polymer dispersed liquid crystal panel 230 are used to form a post-slit grating. Specifically, referring to fig. 3, the periodic structure unit in the light source array 100 is composed of a light source 110, a first cylindrical lens 120, and a second cylindrical lens 130. The light emitted from the light source 110 may be converged by the first cylindrical lens 120, and the distance from the light converging position to the second cylindrical lens 130 is equal to the focal length of the second cylindrical lens 130, so that the light beam may form a light beam which does not diverge in the x-direction and propagates only in the y-z plane after passing through the second cylindrical lens 130. Referring to fig. 2, the first, second and third polymer-dispersed liquid crystal panels 210-230 are capable of switching between scattering and transparent states, electrodes are disposed on the upper and lower polymer materials of the first polymer-dispersed liquid crystal panel 210 and the second and third polymer-dispersed liquid crystal panels 220-230, uniformly distributed liquid crystal particles are disposed between the electrodes, and switching between scattering and transparent states is performed, when no voltage is applied to the electrodes of the polymer-dispersed liquid crystal panel 210, a regular electric field cannot be formed between the electrodes, the optical axes of the liquid crystal particles are oriented randomly, and a disordered state is presented, the effective refractive index of the liquid crystal particles is not matched with the refractive index of the polymer, and incident light is strongly scattered; when a voltage is applied between the electrodes, the refractive index of the liquid crystal particles substantially matches the refractive index of the polymer, and the polymer dispersed liquid crystal panel 210 is transparent, so that incident light is not scattered. Only a single one of the polymer dispersed liquid crystal panels is in a scattering state at the same time. Referring to fig. 1, at this time, the second polymer dispersed liquid crystal panel 220 is in a scattering state, the first and third polymer dispersed liquid crystal panels 210 and 230 are in a transparent state, and the light beam transmitted only in the y-z plane projected by each periodic structure unit of the light source array 100 will form vertical stripes aligned in the horizontal direction at the position of the second polymer dispersed liquid crystal panel 220 and scatter toward the liquid crystal display panel 300, thereby forming a rear grating for realizing a rear slit grating structure.
The liquid crystal display panel 300 is used for providing parallax composite images, and pixels belonging to different parallax images are sequentially arranged in columns on the liquid crystal display panel. Referring to fig. 1, the liquid crystal display panel 300 is sequentially arranged with pixel columns belonging to 4 different parallax images according to a column periodicity, and the rear raster can project the pixels to different spatial positions in the horizontal direction, so as to form 4 viewpoints. When the eyes are positioned at different viewpoint positions, parallax images corresponding to the eyes can be seen, so that stereoscopic vision is generated.
In the stereoscopic display device 010 with adjustable optimal viewing distance, the distances from the first, second and third polymer dispersed liquid crystal panels 210-230 to the liquid crystal display panel 300 are as followsd5.2 mm,5 mm, and 4.8 mm, respectively, the pitch of the pixel columns belonging to the same parallax image on the liquid crystal display panel 300p1 mm, horizontal pitch of periodic structure units of light source array 100l1.01. 1.01 mm, the optimum viewing distance isD. The above parameters satisfyD=pd/(l-p)。
According to the above, when the first polymer dispersed liquid crystal panel 210 is in a scattering state, the optimum viewing distanceD520 mm; optimum viewing distance when the second polymer dispersed liquid crystal panel 220 is in a scattering stateD500 mm; optimum viewing distance when the third polymer dispersed liquid crystal panel 230 is in a scattering stateD480 mm.
In summary, in the stereoscopic display device 010 with adjustable optimal viewing distance, the corresponding polymer dispersed liquid crystal panel can be selected according to the viewer position and be in a scattering state, and the optimal viewing distance can be effectively adjusted.
Claims (2)
1. A stereoscopic display device with an adjustable optimal viewing distance, characterized in that: the stereoscopic display device with the adjustable optimal viewing distance consists of a light source array, a first polymer dispersed liquid crystal plate, a second polymer dispersed liquid crystal plate, a third polymer dispersed liquid crystal plate and a liquid crystal display panel, wherein the light source array, the first polymer dispersed liquid crystal plate, the second polymer dispersed liquid crystal plate, the third polymer dispersed liquid crystal plate and the liquid crystal display panel are sequentially arranged front and back, and periodic junctions in the light source arrayThe structure units can emit light beams forwards, the emitted light beams are not horizontally dispersed in the propagation direction, the first polymer dispersed liquid crystal plate, the second polymer dispersed liquid crystal plate and the third polymer dispersed liquid crystal plate can be switched between scattering and transparent states, at the same time, only one polymer dispersed liquid crystal plate is in a scattering state, the light beams projected by the light source array are projected to the positions of the polymer dispersed liquid crystal plates in the scattering state to form vertical stripes which are horizontally arranged and scatter towards the direction of the liquid crystal display panel, thereby forming a rear grating used for realizing a rear slit grating structure, the liquid crystal display panel is used for providing parallax synthetic images, pixels belonging to different parallax images are sequentially arranged on the liquid crystal display panel according to columns, and the light source array, the first polymer dispersed liquid crystal panel, the second polymer dispersed liquid crystal panel and the rear slit grating formed by the third polymer dispersed liquid crystal panel can project the pixels belonging to different parallax images to different space positions in the horizontal direction so as to form view points, and when human eyes are positioned at different view point positions, the parallax images corresponding to the human eyes can be seen, so that stereoscopic vision is generated; the distance from the polymer dispersed liquid crystal panel in the scattering state to the liquid crystal display panel isdThe pitch of the pixel columns belonging to the same parallax image on the liquid crystal display panel ispThe horizontal pitch of the periodic structure unit of the light source array islThe optimal viewing distance isDThe above parameters satisfyD=pd/(l-p) The method comprises the steps of carrying out a first treatment on the surface of the The periodic structure unit in the light source array is composed of light sources and cylindrical lenses.
2. A stereoscopic display apparatus with an adjustable optimum viewing distance according to claim 1, wherein: the number of polymer dispersed liquid crystal panels may be increased or decreased.
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| CN112505942B (en) * | 2021-02-03 | 2021-04-20 | 成都工业学院 | Multi-resolution stereoscopic display device based on rear projection light source |
| CN113050294B (en) * | 2021-04-09 | 2022-08-26 | 成都工业学院 | Low-crosstalk three-dimensional display device without color moire fringes |
| CN116047788B (en) * | 2023-03-31 | 2023-09-29 | 成都工业学院 | Super-resolution stereoscopic display device |
| CN116338975B (en) * | 2023-05-30 | 2023-07-28 | 成都工业学院 | Stereoscopic display device based on display bar array |
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